3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
22 * fdt_getprop_u32_default_node - Return a node's property or a default
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
33 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
34 const char *prop, const u32 dflt)
39 val = fdt_getprop(fdt, off, prop, &len);
41 /* Check if property exists */
45 /* Check if property is long enough */
46 if (len < ((cell + 1) * sizeof(uint32_t)))
49 return fdt32_to_cpu(*val);
53 * fdt_getprop_u32_default - Find a node and return it's property or a default
55 * @fdt: ptr to device tree
57 * @prop: property name
58 * @dflt: default value if the property isn't found
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
63 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
64 const char *prop, const u32 dflt)
68 off = fdt_path_offset(fdt, path);
72 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
76 * fdt_find_and_setprop: Find a node and set it's property
78 * @fdt: ptr to device tree
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
85 * Convenience function to directly set a property given the path to the node.
87 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
88 const void *val, int len, int create)
90 int nodeoff = fdt_path_offset(fdt, node);
95 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
96 return 0; /* create flag not set; so exit quietly */
98 return fdt_setprop(fdt, nodeoff, prop, val, len);
102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
111 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
115 offset = fdt_subnode_offset(fdt, parentoffset, name);
117 if (offset == -FDT_ERR_NOTFOUND)
118 offset = fdt_add_subnode(fdt, parentoffset, name);
121 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
126 /* rename to CONFIG_OF_STDOUT_PATH ? */
127 #if defined(OF_STDOUT_PATH)
128 static int fdt_fixup_stdout(void *fdt, int chosenoff)
130 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
131 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
133 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
134 static void fdt_fill_multisername(char *sername, size_t maxlen)
136 const char *outname = stdio_devices[stdout]->name;
138 if (strcmp(outname, "serial") > 0)
139 strncpy(sername, outname, maxlen);
142 if (strcmp(outname + 1, "serial") > 0)
143 strncpy(sername, outname + 1, maxlen);
146 static int fdt_fixup_stdout(void *fdt, int chosenoff)
150 char sername[9] = { 0 };
153 char tmp[256]; /* long enough */
155 fdt_fill_multisername(sername, sizeof(sername) - 1);
157 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
159 aliasoff = fdt_path_offset(fdt, "/aliases");
165 path = fdt_getprop(fdt, aliasoff, sername, &len);
171 /* fdt_setprop may break "path" so we copy it to tmp buffer */
172 memcpy(tmp, path, len);
174 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
176 printf("WARNING: could not set linux,stdout-path %s.\n",
182 printf("WARNING: %s: could not read %s alias: %s\n",
183 __func__, sername, fdt_strerror(err));
188 static int fdt_fixup_stdout(void *fdt, int chosenoff)
194 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
195 uint64_t val, int is_u64)
198 return fdt_setprop_u64(fdt, nodeoffset, name, val);
200 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
203 int fdt_root(void *fdt)
208 err = fdt_check_header(fdt);
210 printf("fdt_root: %s\n", fdt_strerror(err));
214 serial = getenv("serial#");
216 err = fdt_setprop(fdt, 0, "serial-number", serial,
220 printf("WARNING: could not set serial-number %s.\n",
229 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
236 /* just return if the size of initrd is zero */
237 if (initrd_start == initrd_end)
240 /* find or create "/chosen" node. */
241 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
245 total = fdt_num_mem_rsv(fdt);
248 * Look for an existing entry and update it. If we don't find
249 * the entry, we will j be the next available slot.
251 for (j = 0; j < total; j++) {
252 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
253 if (addr == initrd_start) {
254 fdt_del_mem_rsv(fdt, j);
259 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
261 printf("fdt_initrd: %s\n", fdt_strerror(err));
265 is_u64 = (fdt_address_cells(fdt, 0) == 2);
267 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
268 (uint64_t)initrd_start, is_u64);
271 printf("WARNING: could not set linux,initrd-start %s.\n",
276 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
277 (uint64_t)initrd_end, is_u64);
280 printf("WARNING: could not set linux,initrd-end %s.\n",
289 int fdt_chosen(void *fdt)
293 char *str; /* used to set string properties */
295 err = fdt_check_header(fdt);
297 printf("fdt_chosen: %s\n", fdt_strerror(err));
301 /* find or create "/chosen" node. */
302 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
306 str = getenv("bootargs");
308 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
311 printf("WARNING: could not set bootargs %s.\n",
317 return fdt_fixup_stdout(fdt, nodeoffset);
320 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
321 const void *val, int len, int create)
325 debug("Updating property '%s/%s' = ", path, prop);
326 for (i = 0; i < len; i++)
327 debug(" %.2x", *(u8*)(val+i));
330 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
332 printf("Unable to update property %s:%s, err=%s\n",
333 path, prop, fdt_strerror(rc));
336 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
339 fdt32_t tmp = cpu_to_fdt32(val);
340 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
343 void do_fixup_by_prop(void *fdt,
344 const char *pname, const void *pval, int plen,
345 const char *prop, const void *val, int len,
351 debug("Updating property '%s' = ", prop);
352 for (i = 0; i < len; i++)
353 debug(" %.2x", *(u8*)(val+i));
356 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
357 while (off != -FDT_ERR_NOTFOUND) {
358 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
359 fdt_setprop(fdt, off, prop, val, len);
360 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
364 void do_fixup_by_prop_u32(void *fdt,
365 const char *pname, const void *pval, int plen,
366 const char *prop, u32 val, int create)
368 fdt32_t tmp = cpu_to_fdt32(val);
369 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
372 void do_fixup_by_compat(void *fdt, const char *compat,
373 const char *prop, const void *val, int len, int create)
378 debug("Updating property '%s' = ", prop);
379 for (i = 0; i < len; i++)
380 debug(" %.2x", *(u8*)(val+i));
383 off = fdt_node_offset_by_compatible(fdt, -1, compat);
384 while (off != -FDT_ERR_NOTFOUND) {
385 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
386 fdt_setprop(fdt, off, prop, val, len);
387 off = fdt_node_offset_by_compatible(fdt, off, compat);
391 void do_fixup_by_compat_u32(void *fdt, const char *compat,
392 const char *prop, u32 val, int create)
394 fdt32_t tmp = cpu_to_fdt32(val);
395 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
399 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
401 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
405 int address_cells = fdt_address_cells(fdt, 0);
406 int size_cells = fdt_size_cells(fdt, 0);
409 for (i = 0; i < n; i++) {
410 if (address_cells == 2)
411 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
413 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
414 p += 4 * address_cells;
417 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
419 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
423 return p - (char *)buf;
426 #ifdef CONFIG_NR_DRAM_BANKS
427 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
429 #define MEMORY_BANKS_MAX 4
431 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
435 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
437 if (banks > MEMORY_BANKS_MAX) {
438 printf("%s: num banks %d exceeds hardcoded limit %d."
439 " Recompile with higher MEMORY_BANKS_MAX?\n",
440 __FUNCTION__, banks, MEMORY_BANKS_MAX);
444 err = fdt_check_header(blob);
446 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
450 /* find or create "/memory" node. */
451 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
455 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
458 printf("WARNING: could not set %s %s.\n", "device_type",
466 len = fdt_pack_reg(blob, tmp, start, size, banks);
468 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
470 printf("WARNING: could not set %s %s.\n",
471 "reg", fdt_strerror(err));
477 int fdt_fixup_memory(void *blob, u64 start, u64 size)
479 return fdt_fixup_memory_banks(blob, &start, &size, 1);
482 void fdt_fixup_ethernet(void *fdt)
488 unsigned char mac_addr[6];
491 node = fdt_path_offset(fdt, "/aliases");
495 for (offset = fdt_first_property_offset(fdt, node);
497 offset = fdt_next_property_offset(fdt, offset)) {
499 int len = strlen("ethernet");
501 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
502 if (!strncmp(name, "ethernet", len)) {
503 i = trailing_strtol(name);
506 strcpy(mac, "ethaddr");
508 sprintf(mac, "eth%daddr", i);
516 for (j = 0; j < 6; j++) {
518 simple_strtoul(tmp, &end, 16) : 0;
520 tmp = (*end) ? end + 1 : end;
523 do_fixup_by_path(fdt, path, "mac-address",
525 do_fixup_by_path(fdt, path, "local-mac-address",
531 /* Resize the fdt to its actual size + a bit of padding */
532 int fdt_shrink_to_minimum(void *blob)
542 total = fdt_num_mem_rsv(blob);
543 for (i = 0; i < total; i++) {
544 fdt_get_mem_rsv(blob, i, &addr, &size);
545 if (addr == (uintptr_t)blob) {
546 fdt_del_mem_rsv(blob, i);
552 * Calculate the actual size of the fdt
553 * plus the size needed for 5 fdt_add_mem_rsv, one
554 * for the fdt itself and 4 for a possible initrd
555 * ((initrd-start + initrd-end) * 2 (name & value))
557 actualsize = fdt_off_dt_strings(blob) +
558 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
560 /* Make it so the fdt ends on a page boundary */
561 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
562 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
564 /* Change the fdt header to reflect the correct size */
565 fdt_set_totalsize(blob, actualsize);
567 /* Add the new reservation */
568 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
576 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
578 #define FDT_PCI_PREFETCH (0x40000000)
579 #define FDT_PCI_MEM32 (0x02000000)
580 #define FDT_PCI_IO (0x01000000)
581 #define FDT_PCI_MEM64 (0x03000000)
583 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
585 int addrcell, sizecell, len, r;
587 /* sized based on pci addr cells, size-cells, & address-cells */
588 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
590 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
591 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
593 dma_range = &dma_ranges[0];
594 for (r = 0; r < hose->region_count; r++) {
595 u64 bus_start, phys_start, size;
597 /* skip if !PCI_REGION_SYS_MEMORY */
598 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
601 bus_start = (u64)hose->regions[r].bus_start;
602 phys_start = (u64)hose->regions[r].phys_start;
603 size = (u64)hose->regions[r].size;
606 if (size >= 0x100000000ull)
607 dma_range[0] |= FDT_PCI_MEM64;
609 dma_range[0] |= FDT_PCI_MEM32;
610 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
611 dma_range[0] |= FDT_PCI_PREFETCH;
612 #ifdef CONFIG_SYS_PCI_64BIT
613 dma_range[1] = bus_start >> 32;
617 dma_range[2] = bus_start & 0xffffffff;
620 dma_range[3] = phys_start >> 32;
621 dma_range[4] = phys_start & 0xffffffff;
623 dma_range[3] = phys_start & 0xffffffff;
627 dma_range[3 + addrcell + 0] = size >> 32;
628 dma_range[3 + addrcell + 1] = size & 0xffffffff;
630 dma_range[3 + addrcell + 0] = size & 0xffffffff;
633 dma_range += (3 + addrcell + sizecell);
636 len = dma_range - &dma_ranges[0];
638 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
644 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
646 * Provide a weak default function to return the flash bank size.
647 * There might be multiple non-identical flash chips connected to one
648 * chip-select, so we need to pass an index as well.
650 u32 __flash_get_bank_size(int cs, int idx)
652 extern flash_info_t flash_info[];
655 * As default, a simple 1:1 mapping is provided. Boards with
656 * a different mapping need to supply a board specific mapping
659 return flash_info[cs].size;
661 u32 flash_get_bank_size(int cs, int idx)
662 __attribute__((weak, alias("__flash_get_bank_size")));
665 * This function can be used to update the size in the "reg" property
666 * of all NOR FLASH device nodes. This is necessary for boards with
667 * non-fixed NOR FLASH sizes.
669 int fdt_fixup_nor_flash_size(void *blob)
671 char compat[][16] = { "cfi-flash", "jedec-flash" };
674 struct fdt_property *prop;
678 for (i = 0; i < 2; i++) {
679 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
680 while (off != -FDT_ERR_NOTFOUND) {
684 * Found one compatible node, so fixup the size
685 * int its reg properties
687 prop = fdt_get_property_w(blob, off, "reg", &len);
689 int tuple_size = 3 * sizeof(reg);
692 * There might be multiple reg-tuples,
693 * so loop through them all
695 reg = reg2 = (u32 *)&prop->data[0];
696 for (idx = 0; idx < (len / tuple_size); idx++) {
698 * Update size in reg property
700 reg[2] = flash_get_bank_size(reg[0],
704 * Point to next reg tuple
709 fdt_setprop(blob, off, "reg", reg2, len);
712 /* Move to next compatible node */
713 off = fdt_node_offset_by_compatible(blob, off,
722 int fdt_increase_size(void *fdt, int add_len)
726 newlen = fdt_totalsize(fdt) + add_len;
728 /* Open in place with a new len */
729 return fdt_open_into(fdt, fdt, newlen);
732 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
733 #include <jffs2/load_kernel.h>
734 #include <mtd_node.h>
741 int fdt_del_subnodes(const void *blob, int parent_offset)
746 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
747 (off >= 0) && (ndepth > 0);
748 off = fdt_next_node(blob, off, &ndepth)) {
750 debug("delete %s: offset: %x\n",
751 fdt_get_name(blob, off, 0), off);
752 ret = fdt_del_node((void *)blob, off);
754 printf("Can't delete node: %s\n",
766 int fdt_del_partitions(void *blob, int parent_offset)
773 off = fdt_next_node(blob, parent_offset, &ndepth);
774 if (off > 0 && ndepth == 1) {
775 prop = fdt_getprop(blob, off, "label", NULL);
778 * Could not find label property, nand {}; node?
779 * Check subnode, delete partitions there if any.
781 return fdt_del_partitions(blob, off);
783 ret = fdt_del_subnodes(blob, parent_offset);
785 printf("Can't remove subnodes: %s\n",
794 int fdt_node_set_part_info(void *blob, int parent_offset,
795 struct mtd_device *dev)
797 struct list_head *pentry;
798 struct part_info *part;
799 struct reg_cell cell;
804 ret = fdt_del_partitions(blob, parent_offset);
809 * Check if it is nand {}; subnode, adjust
810 * the offset in this case
812 off = fdt_next_node(blob, parent_offset, &ndepth);
813 if (off > 0 && ndepth == 1)
817 list_for_each_prev(pentry, &dev->parts) {
820 part = list_entry(pentry, struct part_info, link);
822 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
823 part_num, part->name, part->size,
824 part->offset, part->mask_flags);
826 sprintf(buf, "partition@%llx", part->offset);
828 ret = fdt_add_subnode(blob, parent_offset, buf);
829 if (ret == -FDT_ERR_NOSPACE) {
830 ret = fdt_increase_size(blob, 512);
835 } else if (ret < 0) {
836 printf("Can't add partition node: %s\n",
842 /* Check MTD_WRITEABLE_CMD flag */
843 if (part->mask_flags & 1) {
845 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
846 if (ret == -FDT_ERR_NOSPACE) {
847 ret = fdt_increase_size(blob, 512);
856 cell.r0 = cpu_to_fdt32(part->offset);
857 cell.r1 = cpu_to_fdt32(part->size);
859 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
860 if (ret == -FDT_ERR_NOSPACE) {
861 ret = fdt_increase_size(blob, 512);
870 ret = fdt_setprop_string(blob, newoff, "label", part->name);
871 if (ret == -FDT_ERR_NOSPACE) {
872 ret = fdt_increase_size(blob, 512);
884 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
887 printf("Can't add property: %s\n", fdt_strerror(ret));
892 * Update partitions in nor/nand nodes using info from
893 * mtdparts environment variable. The nodes to update are
894 * specified by node_info structure which contains mtd device
895 * type and compatible string: E. g. the board code in
896 * ft_board_setup() could use:
898 * struct node_info nodes[] = {
899 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
900 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
903 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
905 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
907 struct node_info *ni = node_info;
908 struct mtd_device *dev;
913 parts = getenv("mtdparts");
917 if (mtdparts_init() != 0)
920 for (i = 0; i < node_info_size; i++) {
922 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
923 while (noff != -FDT_ERR_NOTFOUND) {
924 debug("%s: %s, mtd dev type %d\n",
925 fdt_get_name(blob, noff, 0),
926 ni[i].compat, ni[i].type);
927 dev = device_find(ni[i].type, idx++);
929 if (fdt_node_set_part_info(blob, noff, dev))
930 return; /* return on error */
933 /* Jump to next flash node */
934 noff = fdt_node_offset_by_compatible(blob, noff,
941 void fdt_del_node_and_alias(void *blob, const char *alias)
943 int off = fdt_path_offset(blob, alias);
948 fdt_del_node(blob, off);
950 off = fdt_path_offset(blob, "/aliases");
951 fdt_delprop(blob, off, alias);
954 /* Max address size we deal with */
955 #define OF_MAX_ADDR_CELLS 4
956 #define OF_BAD_ADDR FDT_ADDR_T_NONE
957 #define OF_CHECK_COUNTS(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS)
961 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
965 printf(" %08x", *(addr++));
969 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
972 /* Callbacks for bus specific translators */
975 const char *addresses;
976 void (*count_cells)(void *blob, int parentoffset,
977 int *addrc, int *sizec);
978 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
979 int na, int ns, int pna);
980 int (*translate)(fdt32_t *addr, u64 offset, int na);
983 /* Default translator (generic bus) */
984 void of_bus_default_count_cells(void *blob, int parentoffset,
985 int *addrc, int *sizec)
990 *addrc = fdt_address_cells(blob, parentoffset);
993 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
995 *sizec = be32_to_cpup(prop);
1001 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1002 int na, int ns, int pna)
1006 cp = of_read_number(range, na);
1007 s = of_read_number(range + na + pna, ns);
1008 da = of_read_number(addr, na);
1010 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1011 ", da=%" PRIu64 "\n", cp, s, da);
1013 if (da < cp || da >= (cp + s))
1018 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1020 u64 a = of_read_number(addr, na);
1021 memset(addr, 0, na * 4);
1024 addr[na - 2] = cpu_to_fdt32(a >> 32);
1025 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1030 /* Array of bus specific translators */
1031 static struct of_bus of_busses[] = {
1036 .count_cells = of_bus_default_count_cells,
1037 .map = of_bus_default_map,
1038 .translate = of_bus_default_translate,
1042 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1043 struct of_bus *pbus, fdt32_t *addr,
1044 int na, int ns, int pna, const char *rprop)
1046 const fdt32_t *ranges;
1049 u64 offset = OF_BAD_ADDR;
1051 /* Normally, an absence of a "ranges" property means we are
1052 * crossing a non-translatable boundary, and thus the addresses
1053 * below the current not cannot be converted to CPU physical ones.
1054 * Unfortunately, while this is very clear in the spec, it's not
1055 * what Apple understood, and they do have things like /uni-n or
1056 * /ht nodes with no "ranges" property and a lot of perfectly
1057 * useable mapped devices below them. Thus we treat the absence of
1058 * "ranges" as equivalent to an empty "ranges" property which means
1059 * a 1:1 translation at that level. It's up to the caller not to try
1060 * to translate addresses that aren't supposed to be translated in
1061 * the first place. --BenH.
1063 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1064 if (ranges == NULL || rlen == 0) {
1065 offset = of_read_number(addr, na);
1066 memset(addr, 0, pna * 4);
1067 debug("OF: no ranges, 1:1 translation\n");
1071 debug("OF: walking ranges...\n");
1073 /* Now walk through the ranges */
1075 rone = na + pna + ns;
1076 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1077 offset = bus->map(addr, ranges, na, ns, pna);
1078 if (offset != OF_BAD_ADDR)
1081 if (offset == OF_BAD_ADDR) {
1082 debug("OF: not found !\n");
1085 memcpy(addr, ranges + na, 4 * pna);
1088 of_dump_addr("OF: parent translation for:", addr, pna);
1089 debug("OF: with offset: %" PRIu64 "\n", offset);
1091 /* Translate it into parent bus space */
1092 return pbus->translate(addr, offset, pna);
1096 * Translate an address from the device-tree into a CPU physical address,
1097 * this walks up the tree and applies the various bus mappings on the
1100 * Note: We consider that crossing any level with #size-cells == 0 to mean
1101 * that translation is impossible (that is we are not dealing with a value
1102 * that can be mapped to a cpu physical address). This is not really specified
1103 * that way, but this is traditionally the way IBM at least do things
1105 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1109 struct of_bus *bus, *pbus;
1110 fdt32_t addr[OF_MAX_ADDR_CELLS];
1111 int na, ns, pna, pns;
1112 u64 result = OF_BAD_ADDR;
1114 debug("OF: ** translation for device %s **\n",
1115 fdt_get_name(blob, node_offset, NULL));
1117 /* Get parent & match bus type */
1118 parent = fdt_parent_offset(blob, node_offset);
1121 bus = &of_busses[0];
1123 /* Cound address cells & copy address locally */
1124 bus->count_cells(blob, parent, &na, &ns);
1125 if (!OF_CHECK_COUNTS(na)) {
1126 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1127 fdt_get_name(blob, node_offset, NULL));
1130 memcpy(addr, in_addr, na * 4);
1132 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1133 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1134 of_dump_addr("OF: translating address:", addr, na);
1138 /* Switch to parent bus */
1139 node_offset = parent;
1140 parent = fdt_parent_offset(blob, node_offset);
1142 /* If root, we have finished */
1144 debug("OF: reached root node\n");
1145 result = of_read_number(addr, na);
1149 /* Get new parent bus and counts */
1150 pbus = &of_busses[0];
1151 pbus->count_cells(blob, parent, &pna, &pns);
1152 if (!OF_CHECK_COUNTS(pna)) {
1153 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1154 fdt_get_name(blob, node_offset, NULL));
1158 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1159 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1161 /* Apply bus translation */
1162 if (of_translate_one(blob, node_offset, bus, pbus,
1163 addr, na, ns, pna, rprop))
1166 /* Complete the move up one level */
1171 of_dump_addr("OF: one level translation:", addr, na);
1178 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1180 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1184 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1185 * who's reg property matches a physical cpu address
1187 * @blob: ptr to device tree
1188 * @compat: compatiable string to match
1189 * @compat_off: property name
1192 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1193 phys_addr_t compat_off)
1195 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1196 while (off != -FDT_ERR_NOTFOUND) {
1197 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1199 if (compat_off == fdt_translate_address(blob, off, reg))
1202 off = fdt_node_offset_by_compatible(blob, off, compat);
1205 return -FDT_ERR_NOTFOUND;
1209 * fdt_alloc_phandle: Return next free phandle value
1211 * @blob: ptr to device tree
1213 int fdt_alloc_phandle(void *blob)
1216 uint32_t phandle = 0;
1218 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1219 offset = fdt_next_node(blob, offset, NULL)) {
1220 phandle = max(phandle, fdt_get_phandle(blob, offset));
1227 * fdt_set_phandle: Create a phandle property for the given node
1229 * @fdt: ptr to device tree
1230 * @nodeoffset: node to update
1231 * @phandle: phandle value to set (must be unique)
1233 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1238 int off = fdt_node_offset_by_phandle(fdt, phandle);
1240 if ((off >= 0) && (off != nodeoffset)) {
1243 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1244 printf("Trying to update node %s with phandle %u ",
1247 fdt_get_path(fdt, off, buf, sizeof(buf));
1248 printf("that already exists in node %s.\n", buf);
1249 return -FDT_ERR_BADPHANDLE;
1253 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1258 * For now, also set the deprecated "linux,phandle" property, so that we
1259 * don't break older kernels.
1261 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1267 * fdt_create_phandle: Create a phandle property for the given node
1269 * @fdt: ptr to device tree
1270 * @nodeoffset: node to update
1272 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1274 /* see if there is a phandle already */
1275 int phandle = fdt_get_phandle(fdt, nodeoffset);
1277 /* if we got 0, means no phandle so create one */
1281 phandle = fdt_alloc_phandle(fdt);
1282 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1284 printf("Can't set phandle %u: %s\n", phandle,
1294 * fdt_set_node_status: Set status for the given node
1296 * @fdt: ptr to device tree
1297 * @nodeoffset: node to update
1298 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1299 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1300 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1302 int fdt_set_node_status(void *fdt, int nodeoffset,
1303 enum fdt_status status, unsigned int error_code)
1312 case FDT_STATUS_OKAY:
1313 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1315 case FDT_STATUS_DISABLED:
1316 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1318 case FDT_STATUS_FAIL:
1319 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1321 case FDT_STATUS_FAIL_ERROR_CODE:
1322 sprintf(buf, "fail-%d", error_code);
1323 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1326 printf("Invalid fdt status: %x\n", status);
1335 * fdt_set_status_by_alias: Set status for the given node given an alias
1337 * @fdt: ptr to device tree
1338 * @alias: alias of node to update
1339 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1340 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1341 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1343 int fdt_set_status_by_alias(void *fdt, const char* alias,
1344 enum fdt_status status, unsigned int error_code)
1346 int offset = fdt_path_offset(fdt, alias);
1348 return fdt_set_node_status(fdt, offset, status, error_code);
1351 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1352 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1357 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1358 if (noff != -FDT_ERR_NOTFOUND) {
1359 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1361 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1362 if (ret == -FDT_ERR_NOSPACE) {
1363 ret = fdt_increase_size(blob, 512);
1368 } else if (ret < 0) {
1369 printf("Can't add property: %s\n", fdt_strerror(ret));
1375 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1381 * Verify the physical address of device tree node for a given alias
1383 * This function locates the device tree node of a given alias, and then
1384 * verifies that the physical address of that device matches the given
1385 * parameter. It displays a message if there is a mismatch.
1387 * Returns 1 on success, 0 on failure
1389 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1396 path = fdt_getprop(fdt, anode, alias, NULL);
1398 /* If there's no such alias, then it's not a failure */
1402 node = fdt_path_offset(fdt, path);
1404 printf("Warning: device tree alias '%s' points to invalid "
1405 "node %s.\n", alias, path);
1409 reg = fdt_getprop(fdt, node, "reg", &len);
1411 printf("Warning: device tree node '%s' has no address.\n",
1416 dt_addr = fdt_translate_address(fdt, node, reg);
1417 if (addr != dt_addr) {
1418 printf("Warning: U-Boot configured device %s at address %"
1419 PRIx64 ",\n but the device tree has it address %"
1420 PRIx64 ".\n", alias, addr, dt_addr);
1428 * Returns the base address of an SOC or PCI node
1430 u64 fdt_get_base_address(void *fdt, int node)
1434 const fdt32_t *prop;
1436 naddr = fdt_address_cells(fdt, node);
1438 prop = fdt_getprop(fdt, node, "ranges", &size);
1440 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1444 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1446 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1447 uint64_t *val, int cells)
1449 const fdt32_t *prop32 = &prop[cell_off];
1450 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1452 if ((cell_off + cells) > prop_len)
1453 return -FDT_ERR_NOSPACE;
1457 *val = fdt32_to_cpu(*prop32);
1460 *val = fdt64_to_cpu(*prop64);
1463 return -FDT_ERR_NOSPACE;
1470 * fdt_read_range - Read a node's n'th range property
1472 * @fdt: ptr to device tree
1473 * @node: offset of node
1475 * @child_addr: pointer to storage for the "child address" field
1476 * @addr: pointer to storage for the CPU view translated physical start
1477 * @len: pointer to storage for the range length
1479 * Convenience function that reads and interprets a specific range out of
1480 * a number of the "ranges" property array.
1482 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1483 uint64_t *addr, uint64_t *len)
1485 int pnode = fdt_parent_offset(fdt, node);
1486 const fdt32_t *ranges;
1495 * The "ranges" property is an array of
1496 * { <child address> <parent address> <size in child address space> }
1498 * All 3 elements can span a diffent number of cells. Fetch their size.
1500 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1501 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1502 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1504 /* Now try to get the ranges property */
1505 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1507 return -FDT_ERR_NOTFOUND;
1508 ranges_len /= sizeof(uint32_t);
1510 /* Jump to the n'th entry */
1511 cell = n * (pacells + acells + scells);
1513 /* Read <child address> */
1515 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1522 /* Read <parent address> */
1524 *addr = fdt_translate_address(fdt, node, ranges + cell);
1527 /* Read <size in child address space> */
1529 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1538 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1540 * @fdt: ptr to device tree
1541 * @node: offset of the simplefb node
1542 * @base_address: framebuffer base address
1543 * @width: width in pixels
1544 * @height: height in pixels
1545 * @stride: bytes per line
1546 * @format: pixel format string
1548 * Convenience function to fill and enable a simplefb node.
1550 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1551 u32 height, u32 stride, const char *format)
1555 int i, addrc, sizec, ret;
1557 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1561 cells[i++] = cpu_to_fdt32(base_address >> 32);
1562 cells[i++] = cpu_to_fdt32(base_address);
1565 cells[i++] = cpu_to_fdt32(height * stride);
1567 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1571 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
1572 ret = fdt_set_name(fdt, node, name);
1576 ret = fdt_setprop_u32(fdt, node, "width", width);
1580 ret = fdt_setprop_u32(fdt, node, "height", height);
1584 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1588 ret = fdt_setprop_string(fdt, node, "format", format);
1592 ret = fdt_setprop_string(fdt, node, "status", "okay");
1600 * Update native-mode in display-timings from display environment variable.
1601 * The node to update are specified by path.
1603 int fdt_fixup_display(void *blob, const char *path, const char *display)
1607 if (!display || !path)
1608 return -FDT_ERR_NOTFOUND;
1610 toff = fdt_path_offset(blob, path);
1612 toff = fdt_subnode_offset(blob, toff, "display-timings");
1616 for (off = fdt_first_subnode(blob, toff);
1618 off = fdt_next_subnode(blob, off)) {
1619 uint32_t h = fdt_get_phandle(blob, off);
1620 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1622 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1623 return fdt_setprop_u32(blob, toff, "native-mode", h);